The new overseer tries to repopulate. (Fallout)

Been in the mood to write a fallout-themed story, hope you enjoy! I will say, I am more of a casual fallout fan, so if there’s another vault by the same number I use or another vault with a similar experiment, my apologies.

This story contains SPH, femdom, and obviously some CBT!

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Vault 129 was like many of other vaults underneath the irradiated wastelands of post-nuclear America. It had managed to survive the devastation of the Great War, and within it a community of vault dwellers had created for themselves a new life underground. And like many vaults, it had not necessarily been built with only survival in mind. Instead, Vault 129 had been built to test the feasibility of an automated computer overseer, and just how loyal people could be to a computer program.

For a few generations, this worked well. Sure, the computer would occasionally give odd orders, but by and large it managed to keep the vault running and the vault dwellers happy. But then the odd orders became more frequent, and more violent. It was demanding human sacrifices, the sabotaging of essential resources, orders that would plunge the vault into carnage. Thankfully, these orders would not be blindly followed.

Instead, one vault dweller volunteered to take a look at the computer to see if this was some sort of horrifying glitch. His name was Milton Thomson, a scrawny little dork who worked in the reactor room. He had always shown a proclivity with computers, so he was given the rare honor of going into the overseer’s office to try and find the problem. The room itself was dusty from lack of use, just an empty desk surrounded by some of the most advanced computers pre-war money could buy. He locked himself in for a week, only occasionally cracking open the door to let someone pass him food, then quickly shutting it again. More and more orders came down throughout the vault from the computer, all demanding Milton be killed in increasingly graphic ways. A few orders demanded that the vault’s reactor be put into meltdown and the entire vault be destroyed. But then, after a week of this, the orders stopped. Regular orders resumed. Milton strutted out of the overseer’s office to a hero’s celebration.

Of course, not all of the new orders were back to business as usual. Not long after he had fixed the computer, an order came down that Milton should be made the vault’s first human overseer. Milton himself shrugged and claimed he had no idea why it had said that, but that as overseer he’d be able to watch for glitches in the system more closely, and so was given the keys to the office permanently. Then it ordered he be given a larger bedroom for himself (surely just because his new room would be closer to the overseer’s office and the computers), and extra rations of nuka-cola (but just because the caffein would help him work). Then, it demanded he be given a “mate”; one Sally Jones.

Sally was everything a vault girl should be. Blond, curvy, bubbly personality, the perfect kind of woman to help “repopulate”. So when she was told that she’d been assigned as the “mate” for the scrawny little virgin that had just been declared overseer, she tried her best to act surprised. When she walked into the overseer’s office, she found him sitting behind the desk, grinning ear to ear, practically bouncing with excitement. She locked the door behind her and leaned back against it. She put on a practiced sultry smile, and unzipped the top of her vault suit to better show off her chest.

“So, overseer~, or can I call you Milton? The computer says you need my… company~?”

She purred. Milton wasted no time scrambling out from behind the desk to walk over to her, after quickly closing the blinds on the window behind him that overlooked the vault.

“That’s right Sally! I, um… I guess the computer thought we’d be a good match!”

She let out a giggle as he approached. He was a head shorter than her, and he was blatantly staring straight ahead at her cleavage. She stepped forward and wrapped her arm around his shoulder, pushing his face just an inch from her breasts. Then she grabbed the zipper of his jumpsuit with her other hand, and crouched down as she slowly pulled it down. She then pulled the suit off his shoulders and down to his ankles, leaving him standing in just his tight white underwear, with a damp spot showing where his cock was starting to leak precum. There was a little bit of a bulge in his underwear, but not nearly as much as she had expected. Still, she didn’t slow down, pulling his underwear down and letting his eager three-inch erection pop out of them.

“Mmmmm~ lucky you~”

She giggled and cooed, as she took Milton’s little balls into her hand and started to massage them.

“Just like how it was lucky you were able to ‘fix’ the computer….”

As she says this, her grip tightens a little.

“And how it was ‘lucky’ you’ve been getting a new room, and more rations….”

He starts to look worried as her tone begins to shift, and the facade of just being a pretty airhead begins to fade.

“W-wait…”

He starts to speak, but she squeezes his nuts to shut him up.

“Ever since you ‘fixed’ the computer, you’ve been having all sorts of ‘good luck’, haven’t you? Oh, but I guess you thought I wouldn’t notice, right? That I’d just walk in here and spread my legs, so you can have your way with the ditzy personal sex-toy of your dreams, hmm~?”

“W-wait, wait! It’s not like that! P-please let go, you’re crushing my balls!”

Milton begged as his nuts ached from her grip, but this only made her squeeze harder. He could feel her fingers digging into his testicles, and her nails felt terribly sharp on his skin.

“Uh-uh, lying is what got you into this mess! If you want to keep what little manhood you have, you better start being honest with me!”

“Hnnnggh….. f-fine, alright! When I was going through the code and taking out the parts about destroying the vault, I may have added a few… small… tiny additions….”

“Like the order that you should get to stick your ‘small, tiny addition’ in my pussy~?”

“…I-if I tell you, will you let go?”

“Of course~”

“F-fine, yes, I made it say we should have sex… a-and I’m not that small…”

She gave one last agonizing squeeze, but then let go.

“Good boy, now that wasn’t so hard! See, I’m a girl of my word, you admitted you tried to trick me into having sex with you, so I let go of your poor little nuts!”

But then as he started to relax, while his balls were still aching and starting to swell, she jerked her knee up into them with enough force to lift him off the floor. He immediately fell to the ground, curled up, and clutched his battered manhood as he layed on his stomach.

“OwWwWwwww… w-w-what was that for?! I admitted I messed with the computer, fuck!”

He whined, his face contorted in pain.

“But then you lied to me. You tried to say your pathetic dick isn’t that small, when I can clearly see it is~ and I told you, I hate being lied too~”

She giggled as he whimpered from the pain and humiliation. She then crouched down, and reached under him to pull his cock and balls down between his legs where she could see them, and then step on them.

“Now, I’m guessing you’d rather I don’t go tell everyone what you’ve been up to in here, and I’m guessing you’d really appreciate it if I don’t stomp down hard on your poor little balls. Lucky for you, you are kind of cute, so I’m going to make a deal with you!
First of all, that big fancy room of yours? That’s mine now. You can sleep on the couch or in here, and maybe one day I’ll let you sleep in the bed with me, if you earn it. Same goes for all those little perks you’ve been giving yourself, the extra nuka cola’s are mine too.
Second of all, we can’t have people talking about why I’m living out of ‘your’ room, so we’re going to get married. I’m not your secretary, I’m not your assistant, I’m not your ‘stress relief’, and I’m definitely not your mate. I am your Wife. You can make romantic gestures like kissing me on the cheek and holding my hand, and one kiss on the lips per day, but keep your hands off my ass and my tits. If you decide to get cute and smack my ass, I’m going to use you to demonstrate to the girls how one quick kick can keep their man nice and obedient, got it? Just like sleeping in the bed with me, getting to touch me is a privilege, and you will have to earn it.
And third, if you want to make any more ‘interesting orders’ through the computer, you have to pass them through me first. And I swear to god if you try and make the computer order me to fuck you, or even worse you make it order another woman to fuck you behind my back, the last time I’ll ever touch you is when I turn you into a girl. Permanently. Am I understood?”

To emphasize exactly what she meant by “making him into a girl”, Sally started to press her foot down into Milton’s swollen, aching balls.

“Y-yes, yes! Of course! Anything you say!”

He groveled. She pressed down harder, shifting her weight onto his balls.

“All of it, honey~?”

Her voice was mockingly sweet now. His voice was getting higher and higher in pitch.

“Yes! All of it! We’ll get married! You can have the room! I’ll never touch another girl! Anything you want!”

“Good boy~ I’ll go let everyone know you proposed, try and get that computer to order them to make us a wedding cake!”

And with that she made a heal-turn to grind his balls into the floor, zipped up her vault suit, and hummed happily to herself as she listened to him scream in agony. She made sure to shut the door quickly on her way out, to keep anyone from hearing what she’d just done to the new overseer.

After a few minutes of bawling on the floor, clutching his balls, and feeling like he was going to throw up, Milton managed to crawl his way back up into his chair. His vault suit and underwear were still around his ankles. And in spite of still being able to feel the pain in his stomach from what Sally had done to his nuts, his little cock was still standing at attention. He started stroking it as he thought about what just happened. He had picked Sally purely for her looks, which now seemed very shallow to him. He’d spent plenty of time ogling her when he thought she wouldn’t notice, and jerking off imagining getting to lose his virginity to her, so he thought he’d take the opportunity to live out those fantasies. He’d never thought much of her as a person, just a ditzy blond who he thought would look good out of her vault suit, bent over his desk or on her knees under it. But she’d proven to be far more than that. She was cunning. She was assertive. She was every bit as much of a schemer as he was, and a far better liar. As he tugged on his cock, he could still hear her sweat, mocking voice ringing in his ears. He was in love.